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7. Computer
The computer is widely used in all fields of society. Today, wherever you go, you will find computers being used. For example, computers are used in universities, large corporations, and small offices, etc. It has even entered the homes of ordinary people. As it is able to store and process a large amount of information, the computer bring about great convenience and high efficiency to people of all walks of life.
Computers can help people in different ways. For example, computer help scientists in analyzing data and doing complex calculation. For another example, computers are made use of by engineers in designing a plane, or a spaceship. Besides, computers may also play a great role in helping children with their lesson. Whatever you are doing, you many find computer a useful aid.
However, the computer must be designed and instructed by man. What is more, it is true that computers can make decisions, but they need detailed instructions and programs prepared by humans to operate. Therefore, the computer can never replace the human brain.